US1487462A - Liquid-feed system - Google Patents

Description

March 18 1924.

' 1,48 7,462 E. R. HUNTLEY LIQUID FEED SYSTEM Original Filed April 26. 1920 2 Sheets-Sheet 1 Fiq. .I:

INVENTOR. Ernest 1P..Hunt19 A TTORNEY' March 18 1924.

Original Filed April 26 1920 2 Shets-Sheet 2 m q u 6 1 1 RM: me H u 5 i w 4 mm M Y O 9 mm W 4 5 u m z m 5 4 m H. M 5 e R A 4 t S e 4 r 7 m u E 1 m m 12 M 8 7 I. a 5 n i z mm W 4 WM v m W, m w 7 A M mm mm 4 a 7 L 6 .0 w Q m 66,6 V m/yfiz 71% I Z 6 4 4 Patented Mar. 18, 1924.

UNITED STATES PATENT OFFICE.

Banners. HUNTLEY, or 'ronieno, OHIO, nssrenon TO INDUSTRIAL con.-

PORTION, OF TOLEDO, OHIO, ACOBPORATION OF DELAWARE.

A LIQUID-FEED sYsrEM. a

.Epplicatlon filed April 26, 1920, Serial No. 376,437. Renewed August 3, 1922. Serial No. 578,478.

To all whom it may concern:

Be it known that I, ERNEST, R. HUNTLEY, fuel tank shown in approximately the posia citizen of the United States, residing at tion which the main fuel tank ordinarily I Toledo, in the ceunty of Lucas and State occupies with relation to the engine in comof Ohio, have invented certainnew and use- .mon automobile practice.

ful Improvements in Liquid-Feed Systems, The casting, in which is located the two of which I' declare the following to be a piston pump employed in my invention,

full, clear, and exact description. may be mounted upon the crank case 11 by This invention relates to improvements means of machine'screws 14: and may have in liquid feed systems, and consists pria tubular portion '15 projecting through the marily in means for raising liquid from a casing. The casting, including the tubular low level tank to a high level receptacle by portion 15, is cored out to form a slide-way suction which is relieved intermittently to for a plunger .16 mounted upon the end of prevent the fluid from being drawn into a rod 17, the "plunger to be moved in one the suction pump. The invention consists direction by a cam-18, or the like, driven also in means for automatically cutting ofi by the engine. The motion in the opposite crank "case 11 and a carbureter 12. His 8. Y

the suction to stop the pumping action direction is produced by a, coil spring 19.

whenever the use of liquid falls below the which bears at one end against the plunger quantity capable of being furnished by the 16 and at the opposite end. against the expump. v p tremity of the cored out portion. 7 4

The principal object of the invention is. The forward end of the casting is merely the provision of means for accomplishing a shell for a chamber 20 open to'the atmosthe above results by comparatively simple phere; through a. port 21".. I Opening backand inexpensive apparatus of a character wardly out ofv this chamber in vertical alignnot like to get out of order. a

A further object of the invention is the, rod 17 and the-cored out p0rtion9, are an provision of a fuel umping means, in which oil cylinderf 22 and an air cylinder 23. In the pump is located in the same casing with the former. slides a disk 24c'which has a foran oil pump, the two pumps being driven wardly exten ing rod 241- A h llow piston ment with and upon opposite sides of the 30 from the engine by asingle cam 'orother 25 slides in cylinder 23. The head of pisequivalent means. ton 25 is providedIwith a port 26 adapted Other objects, and objects relating to details of construction and-feconomies' of to its seat during the suction stroke of the manufacture will appear as I proceed with piston by the action of a coil spring 28, as the description of that embodiment of the well as by air pressure. C Piston 25 is fixed invention, which, for the purposes of the upon a rod 29 through which is a central present application, I have illustrated in the bore 30 acting as an air passa e for'the disaccompanying drawings, in which: charge of air ,from the cylin er during the V Figure I is a more or less diagrammatic inward stroke of the piston. The cyllnder.

view showing in elevation an automobile 23 is provided with a port 8 for the admisengine and fuel tank with my invention ap" sion of air at theend of the suction stroke. plied thereto. Rods 24' and 29 are connected at their outer Fig. H is a central, vertical, sectional extremities by-a yoke 31 through the center view through a double piston pump which A of which the rod 17 extends and to which may be employed in my-invention. i it is secured bya nut 32 or other suitable Fig. III is a vertical transverse section means. a taken substantially on the line Ill-Ill, At its rear end the cylinder 22 is in cemlFig. H. I munication upon opposite sides with valve lFig. IV is a central, vertical, sectional. chambers 33 and 34 containing ballchecks view through a high levelreceptacle and-'35 and 36 respectively. .The ball 35 is pumping chamber. e j. pressed towards its seat by acomparatively Similar reference characters refer to like heavy spring '37, while the ball 36 is parts throughout the views. a ressed towards its seat by? a somewhat Referrin to the drawings, 10 indicates ighter spring 38. Nipples '39 and to are an internal combustion engine having a; secured in the casting opposite the chamto. becovered by a .flat check valve 2'Z held 4 i an inclination.

'ing therethrougln 1 member 61 is threaded a nipple 65 which 45 contains a valve chamber 66 in which there i A clamping nut 68 the 65 forms a union with the upper extremit of a pipe 69 leadi I 55 of the tank.

5 where its 60 auxiliary tank bers33 and 34. These nipples are threaded to receive clamping nuts 41 which retain in, position pipes 42 and 43 for conducting I of which a pipe 47 is secured to the casting.

The lower end of this pipe communicates with an oil reservoir in the bottom of th crank case.

The air cylinder 23 is connected at its rear end by means of a nipple 50 and clamping nut 51 to the pipe 52 which leads to the upper'end of a float chamber 53. The latter includes a top 54 which has a central upwardly extending nipple to take a clamping 2 nut 55, holding the pipe 52 in place an forming a tight joint therewith. The lower.

end of the bore of this nipple constitutes a valve seat into which fits a conical valve iece 56, having a stem 57 ided near its 1 ower end in aperforated plate 58. A float 59 mounted upon the stem 57 is adapted to raise the valve piece to shut ofl communication with the pipe 52 whenever the liquid in the float chamber reaches a predetermined level.

The bowl 60 of the float chamber is ex- 1 tended into a member 61 roughly tubular in shape, the interior of which is in communicatlon with the float chamber throu h the perforations in plate 58. The mom 'r 61 has a tubular arm 62 extending upwardly at A flat check valve 63 is mounted upon the end of this arm to close l by gravity, the valve being pivoted, guided,

and at the same time held from too great I movement by a doubly bent wire 64 fixed 1n ite sides of the o nth'e'arm62 upon op K o the lower end 0 the is located a flat u wardl opening check valve 67. The cham ran passages located within the valve 56, 63 and 67 together make up whatI call m umping. chamber. d ed onto the nipple back to the main tan 63 and extending ownwardly through the top thereof toa position near the bottom The pumping chamber through valve 63 into the hi h level receptacle. In the embodiment i ustrated, this high level rece tacle takes the form of an 70, fixed upon and surround ing the pumping chamber. However, I wish to have it understood that this arrangem is merely a preferred embodiment, rather than an essential form of apparatus, as it delivers fluid tank might be omitted and the fuel delivered directl from the pumping chamber into the float chamber of the carbureter. In that event the carbureter itself would be the high level receptacle hereinafter referred to.

In the top of the auxiliary tank 7 O I make a small port 71 for the admission of air, in order that the pressure within this tank may be atmospheric. A pipe 72 is connected with the bottom of the tank by means of a nipple 7 3 and clamping nut 74 and empties into carbureter 12, which is mounted upon the en ine at a level lower than the tank in 0 er that it may be fed by gravity from that tank.

Operation.

The lunger 16 and rod17 reciprocate at cylinder 22 from the reservoir in the bottom of the crank case through pi e 47 and nipple 46 past ball check 45 and through valve chamber44. Upon the com ression stroke of the iston this char 0 oil is forced past ba checks 35 am? 36 through valve chambers 33 and 34 and nipples 39 and 40 out through pipes 42 and 43 to the arts of the engine in need of lubrication. t is assumed that more lubrication is needed by the parts served by pi 43 than those served by (pipe 42, and to this end the spring 38-is ma e of lighter wire than spring 37, thus enabling the'pump pressure to unseat ball check 33 for a longer time than ball check 35. After the oil flows through the bearings to be lubricated, it flows back again by %avity to the bottom of the crank case.

us it is kept in circulation.

The raising of fuel is accomplished by the production intermittently of a partial vacuum in the pumping chamber, the pressure in the pumping chamber being substantially atmospheric 1n the intervals between the suction impulses. The suction pump opcrates at a speed pro ortional to the speed of the engine, but fue is raised in amounts suflicient only to meet the requirements of the e 'he, the action of the pumping chamber being automatically controlled. During each outward or forward stroke of piston 25 the air contained in the top of the pumping chamber and in the pipe 52 is partially ex austed. This enables atmospheric pressure on the top of the fuel in the main" tank to force fuel out through pipe 59 past check valve 67 into the pumping chamber, the check valve 63 remaining closed. As soon as the port is uncovered by the piston in its forward motion air rushes into the cylinder ent v23 and thence through pipe 152 to the tophof t e pressure t us the pum ing chamber, an

conveye to the top of the liquid in that 65 will be perfectly obvious that the auxiliary chamber closes check valves 67 and opens memes check valve 63 permitting a certain amount of fuel to be discharged'through the latter valve into the high level receptacle, which in the present instance, is the auxiliarytank 70. Upon the inward stroke ofthe piston 25 the .check 27 opens permitting passage of air through port 26 in the piston head and through passage 30 in the rod 29, thus tending to equalize the pressure on both sides of the piston. Fuel as requiredby the carbureter in the meantime flows through pipe 72 to the carbureter bowl. The apparatus is so designed, however, as to be capable of furnishing fuel in excess of the needs of the carbureter. Hence, the auxiliary tank 70 soon fills. .Fuel in the float chamber 53 probably stands at approximately the same evel as that in the tank 70. When this level rises sufficiently, the float 59 raises the valve 56 and interrupts communication between the pumping chamber and the pipe 52. The next suction stroke of the piston 25 merely creates a partial vacuum in the pipe 52 whichi is relieved at the end of the stroke by air entering through port 8. This action continues until the 'fuel drawn off by the carbureter permits the float 59 to descend and open the valve 56 when the pumping action is automatically resumed.

Certain features of my invention disclosed but not claimed herein are disclosed and claimed in my copending application Serial No. 372,046, filed April 7 1920 for Vacuum feed systems to which application cross reference is hereby made.

I am aware that the particular embodiment of my invention above described, and illustrated in the accompanying drawings, is susceptible of considerable variation without departing from the spirit thereof, and therefore I desire to claim, my invention broadly as well as specifically as indicated by the appended claims.

I claim as my invention:

1. In a li uid feed system, means for producing suction impulses intermittently and for restorin approximately atmospheric pressure in t e intervals between the suction 1mpulses, a low level main liquid tank, a high level 'rebeptacle, a pumpmg chamber in communication with said tank and with said'receptacle, a connection between said first named means and the top of "said pumping chamber, a float in said (pumping chamber and a valve controlle by said float adapted to close said connectio 2. In a liquid feed system, means for pro- .ducing suction impulses intermittently and for restoring approximately atmospheric pressure in the intervals between the suction impulses, a low level main liquid tank, a high level receptacle, a pumplng chamber in communication with said tank, a connec:

tion between said receptacle and chamber ing chamber and said main tank, a check valve adapted to close said connection, means for producing suction impulses intermittently and for restoring approximately atmospheric pressure in the mtervals between the suction impulses, a connection between said means and the upper part of said pumping chamber, a float in sa1d pumpin chamber and a valve controlled by sa1d float adapted to close said last named connection.

4. In a liquid feed system, means for pro ducing intermittent suction impulses and for restoring approximately atmospheric .pressure in the intervals between the suction imulses; a low' level main liquid tank, a. high evel receptacle, a pumpin chamber in communication with said tan and said receptacle, and a connection between the suction producin means and the top of saidpumping cham er.. 7

' 5. In a pump system for engines, the combination of a ump casing, a pump chamber connected wit said casing, means in said casing for producing suction impulses in said chamber, means for restorin the pressure in said pumpchamber to t at of the atmosphere in the intervals between the suction impulses.

6. In a pump system, the combination of a pump'casing, plural reci rocating mem bers within sa1d casi sai members 'recl rocating along para lelaxes, and sing 0 means for operating said members, one of said reciprocatin members being provided with pressure r 'evi mechanism.

In testimony whereo I aflix my signature ERNEST R. HUN TLEY.

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